Chimney-cowl and ventilator.



F. RI'BMER. GHIMNY GOWL AND VENTILATQR. APPLIoATIoN FILED APB. 24, 1911.

1,001,166. I Patented Aug. 22, 1.911.

UNTTED STATES PATENT OFFICE.

FRANK RIEMER, OF DENVER, COLORADO, ASSIG-NOR OF FORTY-EIGI-IT ONE-HUNDREDTHS TO JULIU'S HARTLER, 0F DENVER, COLORADO.

CHIMNEY-COWL AND VENTILATOR.

Specification of Letters Patent.

Patented Aug. 22, 1911.

Application filed April 24, 1911. Seria1 No. 622,946.

To all whom it may concern:

Be it known that I, FRANK RIEMER, a citizen of the United States,residing at Denver, in the county of Denver and State of Colorado, haveinvented certain new and useful Improvements in Chimney-@owls andVent-ilators; and I do declare the following to be a full, clear, andexact description of thek vent admission of rain, snow or sleet. Thisrobject is accomplished by constructing the cowl or ventilator ashereinafter more fully described and claimed, and as shown in thedrawings wherein- Figure 1 is a central vertical section of thisimproved cowl or ventilator. Figs. 2 and 3 are cross sections on thelines 2 2 and 3-3 of Fig. 1.

This device is made entirely of sheet metal, preferably galvanized so asto prevent rust; and its size and exact shape are matters of no moment.The relative disposition of parts, excepting as hereinafter describedand claimed, may also be altered without departing from the principle ofmy invention.

I-Ieretofore it has been customary to make cowls or ventilators of thischaracter with a series of surrounding hoods to shed the falling rainbut to admit laterally blowing breezes and to deflect the same upwardacross the outlet end of the exhaust pipe or flue; but my presentinvention contains de tails of construction and arrangement asparticularly set forth herein which prevent a lateral or oblique breezefrom interrupting the draft set up by the upwardly-directed wind whichis forced across said flue.

Coming more particularly to a detailed description of the invention, thenumeral 9 designates the flue or exhaust pipe from a chimney,smokestack, or other source through which smoke or other waste gases arepassed out into the air, and in the present drawings this and otherparts are shown circular inform although it will be clear that they mayhave other conto-urs. Surrounding and having their smaller ends nextsaid flue are two frusto-conical hoods 1 and 2 whose walls are bypreference strictly parallel with each other, and whose outer largerends are preferably of the same circumference so that they areaccurately superimposed. These hoods are connected with the flue byupright partitions 4 radial to the flue and preferably about four innumber, united at their upper and lower edges to adjacent faces of thehoods 1 and 2 and at their inner ends with the exterior surface of theflue 9. The smaller end of the hood 2 is of a circumference at the line2O larger than the circumference of the flue, and rising from this lineis a cylindrical drum 3 which surrounds and stands concentricv with saidflue. The upper ends of said partitions 4 are extended upward as at 40between the drum and the flue and connected to the adjacent faces ofboth so that all parts are held rigidly separated and in the relativepositions shown in Fig. 1. The annular space between the drum and flueis by preference of less width than the upright space between the twohoods, so that air entering horizontally between the latter andlaterally between any two partitions 4 is compressed in anuprightdirection when it passes upward into the drum and also compressedtransversely between the two partitions because the latter converge aswill be understood; and therefore the speed of the ini-lowing air isaccelerated as it passes upward through the drum. The' upper end of thelatter is covered with a frustoconical top 5 whose larger lower end isunited with the upper end of the drum and whose smaller upper end standsnear but is disposed a little distance away from the upper extremity ofthe flue 9 so as to leave between them a narrow annular mouth 50; and itwill be clear that the inflowing air, once already compressed bothvertically and transversely as it passes upward into the drum 3, is asecond time compressed vertically as it passes under said frusto-conicaltop 5 and issues from the mouth 50 of the drum 3. The result is thatwhere it issues therefrom it has considerable velocity, and thisupwardly and inwardly moving tubular volume causes a suction upwardthrough the iiue 9 which assists the draft of the chimney or whateverexhaust the flue is'connected with.

In order to protect the upper open end of the flue from snow, hail, andrain which might fall therein, I-provide upright stand-- ards 70 risingfrom the conical top 5, and mount thereon a slightly conical cap 7 whichby preference has a flat bottom 8 whose outer edge united with that ofthe cap on a circle which is a little larger than the circumference ofthe drum 8. This feature of itself is quite old in devices of thischaracter; but in order to prevent lateral or oblique blasts of airblowing over the top 5 and under the cap from interrupting the strongupward draft which flows out the annular mouth 5() and assists the draftthrough the flue 9 as above described, I provide a ring 6, also offrusto-conical shape, whose inner edge surrounds and is supported bysaid uprights 70 and whose body is disposed above and parallel with thetop 5 and is of about the same width. Upwardly movi-ng oblique blasts ofair pass between these two parts 5 and 6, downwardly moving obliqueblasts of air strike the guard ring 6 and are deflected, andhorizontally moving blasts of air strike the ring 5 and pass upwardbetween it and the guard ring 6 and assist the draft which comes upwardthrough the drum rather than otherwise. Hence the presence of this ring6 is beneficial whatever the direction of the wind, and if the entiredevice is made circular as I prefer it will-have the same beneficialeffectr on the draft through the chimney whichever way the wind blows.

What is claimed as new is:

l. The herein described chimney cowl and ventilator comprising a centralcylindrical upright flue, two parallel frusto-conical hoods surroundingit with the smaller end of the lower hood connected with the flue, acylindrical drum spaced from said flue with its lower end connected withthe smallervend of the upper hood, a series of radial partitionsconnecting said hoods and each having an extension at its upper endprojecting upward throughout the length of the drum and connecting thelatter with the flue, and a frusto-conical top to the drum whose largerend is connected therewith and whose smaller end is spaced a slightdistance from the upper end of the Hue so as to leave an annular passagebetween them.

2. The herein described chimney cowl and cap comprising an upright flue,a concentric drum surrounding it, two parallel hoods around the ue andhaving a space between them communicating with the lower end of saiddrum, means for supporting the hoods and drum from the flue, afrusto-conical top whose larger end is united with the upper end of thedrum and whose smaller end is slightly spaced from but stands in ahorizontal line with the upper end of the. flue, standards risingtherefrom, a cap covering said standards, and a frusto-conical guardring surrounding said standards and standing above, of the same size as,and parallel with said top, for the purpose set forth.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses. p

FRANK RIEMER. Witnesses:

JULlUs HARTLER, Jas. F. IREY.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

Washington, D. 0..

